def fib(n):
    a,b = 0,1
    while b < n :
        print(b,end = '')
        a,b = b,a+b
    print()

def fib2(n):
    result  = []
    a,b = 0,1
    while b < n:
        result.append(b)
        a,b = b,a+b
    return result